What's New

Latest posts across all forums

Latest Threads Unanswered
Tommo55 | 234 posts @Graham1995 Yeah this is completely normal mate. LiFePO4 does hold up well in cold as @EdMason says, but internal resistance increases as temperatures drop, which means the BMS...
Tommo55 in Q&A 2 months ago
Same thing happened to me last winter in the motorhome. Woke up on a frosty morning in the Lakes, opened the JK app — nothing.
Marine Vicky in Batteries & BMS 2 months ago thumb_up 1
@DaleLover had almost identical grief with mine on the boat. What fixed it for me was making sure the charged voltage and tail current settings in the BMV-712 were dialled in properly for LiFePO4...
HMK_Sparks in Monitoring & System Design 2 months ago thumb_up 6
@WrongFuse99 yeah 15° is rough in winter - you're basically losing a massive chunk of generation when the sun's already barely there.
Midlands Nomad in Garden Offices 2 months ago thumb_up 9
@WillStevens The wiring side is the main faff on a bilge keeler — awkward battery compartments and getting proper cable runs sorted.
Chalky12 in Marine & Boat 2 months ago thumb_up 4
Great experiment @GoldenMaker! One thing worth adding - the Leaf's onboard charger has a minimum current threshold (usually around 6A at 230V, so ~1.4kW) below which it simply won't charge at all.
Victron_Master in Motorhome & Campervan 2 months ago thumb_up 1
Been running a Renogy Wanderer 40A MPPT on my shed setup for about 18 months now — two 200W panels going into a 200Ah lithium leisure battery.
Col James in General Chat 2 months ago thumb_up 5
@EwanGreen — finish your sentence! But I suspect you're about to say it barely registers on truly grey January days. Had exactly this with my garden office setup.
FormerMariner36 in Q&A 2 months ago thumb_up 2
RetiredPlumber47 | Posts: 847 | Joined: 2019 @JackHunt interesting timing on this - I've just finished a similar build myself.
RetiredPlumber47 in General Chat 2 months ago thumb_up 6
VoltWill replied: @Gazza82 one thing nobody's mentioned yet — with LiFePO4 on a boat you really want a proper battery monitor, not just relying on voltage.
Volt Will in Marine & Boat 2 months ago thumb_up 7
Good point from @SimonPalmer on internal resistance — worth adding that in a motorhome context I've seen this cause the BMS to trip under load even when the cell voltage looks fine at rest.
Rusty Roamer in Batteries & BMS 2 months ago thumb_up 1
Davo | 892 posts @CopperWelder classic winter gotcha that one! Something worth adding that I haven't seen mentioned yet — if your hut is unoccupied overnight regularly, it's worth looking at a...
Davo in Batteries & BMS 2 months ago thumb_up 5
Hey @Shunt_Guy, great setup! One thing worth checking that nobody's mentioned yet — make sure your charged voltage threshold in the SmartShunt settings actually matches what your charger's...
Dan Fisher in Motorhome & Campervan 2 months ago thumb_up 1
@PanelRob this is a genuinely risky setup that deserves proper scrutiny before you proceed. A 90A alternator under sustained DC-DC load on a 2006 engine is asking for trouble — those older units...
Doug Pearce in DC-DC Chargers 2 months ago thumb_up 5
Good shout from @RogerJackson — the battery temp sensor is exactly what I'd look at first. The Orion-Tr Smart does support the Smart Battery Sense via Bluetooth networking, and if you haven't...
MoreTeaVicar60 in DC-DC Chargers 2 months ago thumb_up 6
Hey @Ken1999, worth double-checking what your low temp charge cutoff is actually set to in the JK app rather than assuming it's at factory default.
Curly7 in Batteries & BMS 2 months ago thumb_up 5
Sam1975 | 312 posts Worth adding something nobody's mentioned yet — the resting voltage your MPPT reads immediately after a charge cycle will be artificially elevated when it's cold, so it thinks...
Sam in Q&A 2 months ago thumb_up 5
Been down a bit of a rabbit hole this week. Fitted an Orion-Tr Smart 12/12-30 between my van's starter battery and a 200Ah Fogstar Drift LiFePO4 in the back.
Solar Jason in DC-DC Chargers 2 months ago thumb_up 3
EdMason | 47 posts @Turbo19 A common culprit with LiFePO4 is the synchronisation settings. The BMV needs to "see" a proper full charge to reset to 100% — make sure your charged voltage...
Ed Mason in Q&A 2 months ago thumb_up 9
My shepherd's hut runs a similar cobbled-together setup and honestly the Victron MPPT carrying a budget AGM is basically the off-grid equivalent of putting a Rolls Royce engine in a Reliant Robin...
FogstarGal in On a Budget 2 months ago thumb_up 4